Service Name and Transport Protocol Port Number Registry
- Last Updated
- 2024-12-06
- Expert(s)
-
TCP/UDP: Joe Touch; Eliot Lear, Kumiko Ono, Wes Eddy, Brian Trammell, Jana Iyengar, and Michael Scharf SCTP: Michael Tuexen DCCP: Eddie Kohler and Yoshifumi Nishida
- Reference
- [RFC6335]
- Note
-
Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP. Service names are assigned on a first-come, first-served process, as documented in [RFC6335]. Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535); the different uses of these ranges are described in [RFC6335]. According to Section 8.1.2 of [RFC6335], System Ports are assigned by the "IETF Review" or "IESG Approval" procedures described in [RFC8126]. User Ports are assigned by IANA using the "IETF Review" process, the "IESG Approval" process, or the "Expert Review" process, as per [RFC6335]. Dynamic Ports are not assigned. The registration procedures for service names and port numbers are described in [RFC6335]. Assigned ports both System and User ports SHOULD NOT be used without or prior to IANA registration. ************************************************************************ * PLEASE NOTE THE FOLLOWING: * * * * ASSIGNMENT OF A PORT NUMBER DOES NOT IN ANY WAY IMPLY AN * * ENDORSEMENT OF AN APPLICATION OR PRODUCT, AND THE FACT THAT NETWORK * * TRAFFIC IS FLOWING TO OR FROM A REGISTERED PORT DOES NOT MEAN THAT * * IT IS "GOOD" TRAFFIC, NOR THAT IT NECESSARILY CORRESPONDS TO THE * * ASSIGNED SERVICE. FIREWALL AND SYSTEM ADMINISTRATORS SHOULD * * CHOOSE HOW TO CONFIGURE THEIR SYSTEMS BASED ON THEIR KNOWLEDGE OF * * THE TRAFFIC IN QUESTION, NOT WHETHER THERE IS A PORT NUMBER * * REGISTERED OR NOT. * ************************************************************************
- Request an Assignment
-
[https://www.iana.org/protocols/apply]
- Available Formats
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Service Name | Port Number | Transport Protocol | Description | Assignee | Contact | Registration Date | Modification Date | Reference | Service Code | Unauthorized Use Reported | Assignment Notes |
---|---|---|---|---|---|---|---|---|---|---|---|
ssh | 22 | tcp | The Secure Shell (SSH) Protocol | [RFC4251] | Defined TXT keys: u=<username> p=<password> | ||||||
ssh | 22 | udp | The Secure Shell (SSH) Protocol | [RFC4251] | Defined TXT keys: u=<username> p=<password> | ||||||
smtp | 25 | tcp | Simple Mail Transfer | [IESG] | [IETF_Chair] | 2017-06-05 | [RFC5321] | ||||
smtp | 25 | udp | Simple Mail Transfer | [IESG] | [IETF_Chair] | 2017-06-05 | [RFC5321] | ||||
locus-map | 125 | tcp | Locus PC-Interface Net Map Ser | [Eric_Peterson] | [Eric_Peterson] | ||||||
locus-map | 125 | udp | Locus PC-Interface Net Map Ser | [Eric_Peterson] | [Eric_Peterson] | ||||||
225-241 | Reserved | [Jon_Postel] | [Jon_Postel] | ||||||||
249-255 | Reserved | [Jon_Postel] | [Jon_Postel] | ||||||||
rap | 256 | tcp | RAP | [J_S_Greenfield] | [J_S_Greenfield] | ||||||
rap | 256 | udp | RAP | [J_S_Greenfield] | [J_S_Greenfield] | ||||||
set | 257 | tcp | Secure Electronic Transaction | [Donald_Eastlake] | [Donald_Eastlake] | ||||||
set | 257 | udp | Secure Electronic Transaction | [Donald_Eastlake] | [Donald_Eastlake] | ||||||
258 | Unassigned | 2006-09-13 | |||||||||
esro-gen | 259 | tcp | Efficient Short Remote Operations | [Mohsen_Banan] | [Mohsen_Banan] | ||||||
esro-gen | 259 | udp | Efficient Short Remote Operations | [Mohsen_Banan] | [Mohsen_Banan] | ||||||
325-332 | Unassigned | ||||||||||
icad-el | 425 | tcp | ICAD | [Larry_Stone] | [Larry_Stone] | ||||||
icad-el | 425 | udp | ICAD | [Larry_Stone] | [Larry_Stone] | ||||||
timed | 525 | tcp | timeserver | ||||||||
timed | 525 | udp | timeserver | ||||||||
dec-dlm | 625 | tcp | DEC DLM IANA assigned this well-formed service name as a replacement for "dec_dlm". |
[Rudi_Martin_2] | [Rudi_Martin_2] | ||||||
dec_dlm | 625 | tcp | DEC DLM | [Rudi_Martin_2] | [Rudi_Martin_2] | This entry is an alias to "dec-dlm". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
dec-dlm | 625 | udp | DEC DLM IANA assigned this well-formed service name as a replacement for "dec_dlm". |
[Rudi_Martin_2] | [Rudi_Martin_2] | ||||||
dec_dlm | 625 | udp | DEC DLM | [Rudi_Martin_2] | [Rudi_Martin_2] | This entry is an alias to "dec-dlm". This entry is now historic, not usable for use with many common service discovery mechanisms. | |||||
domain-s | 853 | udp | DNS query-response protocol run over DTLS or QUIC | [IESG] | [IETF_Chair] | 2015-10-08 | 2022-04-01 | [RFC7858][RFC8094][RFC9250] | |||
blackjack | 1025 | tcp | network blackjack | ||||||||
blackjack | 1025 | udp | network blackjack | ||||||||
hpvmmagent | 1125 | tcp | HP VMM Agent | ||||||||
hpvmmagent | 1125 | udp | HP VMM Agent | ||||||||
slinkysearch | 1225 | tcp | SLINKYSEARCH | [Desmond_Chan] | [Desmond_Chan] | ||||||
slinkysearch | 1225 | udp | SLINKYSEARCH | [Desmond_Chan] | [Desmond_Chan] | ||||||
swldy-sias | 1250 | tcp | swldy-sias | [Peter_E_Williams] | [Peter_E_Williams] | ||||||
swldy-sias | 1250 | udp | swldy-sias | [Peter_E_Williams] | [Peter_E_Williams] | ||||||
servergraph | 1251 | tcp | servergraph | [Lindsay_Morris] | [Lindsay_Morris] | ||||||
servergraph | 1251 | udp | servergraph | [Lindsay_Morris] | [Lindsay_Morris] | ||||||
bspne-pcc | 1252 | tcp | bspne-pcc | ||||||||
bspne-pcc | 1252 | udp | bspne-pcc | ||||||||
q55-pcc | 1253 | tcp | q55-pcc | [Prem_Tirilok] | [Prem_Tirilok] | ||||||
q55-pcc | 1253 | udp | q55-pcc | [Prem_Tirilok] | [Prem_Tirilok] | ||||||
de-noc | 1254 | tcp | de-noc | ||||||||
de-noc | 1254 | udp | de-noc | ||||||||
de-cache-query | 1255 | tcp | de-cache-query | ||||||||
de-cache-query | 1255 | udp | de-cache-query | ||||||||
de-server | 1256 | tcp | de-server | [Jeff_Burdette] | [Jeff_Burdette] | ||||||
de-server | 1256 | udp | de-server | [Jeff_Burdette] | [Jeff_Burdette] | ||||||
shockwave2 | 1257 | tcp | Shockwave 2 | [Dave_Simmons] | [Dave_Simmons] | ||||||
shockwave2 | 1257 | udp | Shockwave 2 | [Dave_Simmons] | [Dave_Simmons] | ||||||
opennl | 1258 | tcp | Open Network Library | [Phil_Frisbie] | [Phil_Frisbie] | ||||||
opennl | 1258 | udp | Open Network Library | [Phil_Frisbie] | [Phil_Frisbie] | ||||||
opennl-voice | 1259 | tcp | Open Network Library Voice | [Phil_Frisbie] | [Phil_Frisbie] | ||||||
opennl-voice | 1259 | udp | Open Network Library Voice | [Phil_Frisbie] | [Phil_Frisbie] | ||||||
dx-instrument | 1325 | tcp | DX-Instrument | [Walt_Modic] | [Walt_Modic] | ||||||
dx-instrument | 1325 | udp | DX-Instrument | [Walt_Modic] | [Walt_Modic] | ||||||
zion-lm | 1425 | tcp | Zion Software License Manager | [David_Ferrero] | [David_Ferrero] | ||||||
zion-lm | 1425 | udp | Zion Software License Manager | [David_Ferrero] | [David_Ferrero] | ||||||
eicon-x25 | 1439 | tcp | Eicon X25/SNA Gateway | ||||||||
eicon-x25 | 1439 | udp | Eicon X25/SNA Gateway | ||||||||
orasrv | 1525 | tcp | oracle | ||||||||
orasrv | 1525 | udp | oracle | ||||||||
prospero-np | 1525 | tcp | Prospero Directory Service non-priv | ||||||||
prospero-np | 1525 | udp | Prospero Directory Service non-priv | ||||||||
svs-omagent | 1625 | tcp | svs-omagent | [Alberto_Berlen] | [Alberto_Berlen] | ||||||
svs-omagent | 1625 | udp | svs-omagent | [Alberto_Berlen] | [Alberto_Berlen] | ||||||
iden-ralp | 1725 | tcp | iden-ralp | [Chris_Stanaway] | [Chris_Stanaway] | ||||||
iden-ralp | 1725 | udp | iden-ralp | [Chris_Stanaway] | [Chris_Stanaway] | ||||||
direcpc-video | 1825 | tcp | DirecPC Video | [Chris_Kerrigan] | [Chris_Kerrigan] | ||||||
direcpc-video | 1825 | udp | DirecPC Video | [Chris_Kerrigan] | [Chris_Kerrigan] | ||||||
discovery-port | 1925 | tcp | Surrogate Discovery Port | [Keith_Thompson] | [Keith_Thompson] | ||||||
discovery-port | 1925 | udp | Surrogate Discovery Port | [Keith_Thompson] | [Keith_Thompson] | ||||||
x25-svc-port | 1998 | tcp | cisco X.25 service (XOT) | ||||||||
x25-svc-port | 1998 | udp | cisco X.25 service (XOT) | ||||||||
ellpack | 2025 | tcp | |||||||||
xribs | 2025 | udp | |||||||||
h2250-annex-g | 2099 | tcp | H.225.0 Annex G Signalling | [ITU-T] | [ITU-T_TSB] | 2013-01-31 | |||||
h2250-annex-g | 2099 | udp | H.225.0 Annex G Signalling | [ITU-T] | [ITU-T_TSB] | 2013-01-31 | |||||
lockstep | 2125 | tcp | LOCKSTEP | [Karl_Forster] | [Karl_Forster] | ||||||
lockstep | 2125 | udp | LOCKSTEP | [Karl_Forster] | [Karl_Forster] | ||||||
rcip-itu | 2225 | tcp | Resource Connection Initiation Protocol | [ITU_TSB] | [ITU_TSB] | ||||||
2225 | udp | Reserved | |||||||||
rcip-itu | 2225 | sctp | Resource Connection Initiation Protocol | [ITU_TSB] | [ITU_TSB] | ||||||
remote-collab | 2250 | tcp | remote-collab | [Richard_Walters] | [Richard_Walters] | ||||||
remote-collab | 2250 | udp | remote-collab | [Richard_Walters] | [Richard_Walters] | ||||||
dif-port | 2251 | tcp | Distributed Framework Port | [Sebastien_Lambla] | [Sebastien_Lambla] | ||||||
dif-port | 2251 | udp | Distributed Framework Port | [Sebastien_Lambla] | [Sebastien_Lambla] | ||||||
njenet-ssl | 2252 | tcp | NJENET using SSL | [Hans_U_Schmidt] | [Hans_U_Schmidt] | ||||||
njenet-ssl | 2252 | udp | NJENET using SSL | [Hans_U_Schmidt] | [Hans_U_Schmidt] | ||||||
dtv-chan-req | 2253 | tcp | DTV Channel Request | [Richard_Hodges] | [Richard_Hodges] | ||||||
dtv-chan-req | 2253 | udp | DTV Channel Request | [Richard_Hodges] | [Richard_Hodges] | ||||||
seispoc | 2254 | tcp | Seismic P.O.C. Port | [Robert_Reimiller] | [Robert_Reimiller] | ||||||
seispoc | 2254 | udp | Seismic P.O.C. Port | [Robert_Reimiller] | [Robert_Reimiller] | ||||||
vrtp | 2255 | tcp | VRTP - ViRtue Transfer Protocol | [Max_Fudim] | [Max_Fudim] | ||||||
vrtp | 2255 | udp | VRTP - ViRtue Transfer Protocol | [Max_Fudim] | [Max_Fudim] | ||||||
pcc-mfp | 2256 | tcp | PCC MFP | [Kunihiko_Morota] | [Kunihiko_Morota] | 2005-08 | |||||
pcc-mfp | 2256 | udp | PCC MFP | [Kunihiko_Morota] | [Kunihiko_Morota] | 2005-08 | |||||
simple-tx-rx | 2257 | tcp | simple text/file transfer | [Daniel_Kilsdonk] | [Daniel_Kilsdonk] | 2006-08 | |||||
simple-tx-rx | 2257 | udp | simple text/file transfer | [Daniel_Kilsdonk] | [Daniel_Kilsdonk] | 2006-08 | |||||
rcts | 2258 | tcp | Rotorcraft Communications Test System | [Terry_Eldridge] | [Terry_Eldridge] | 2006-08 | |||||
rcts | 2258 | udp | Rotorcraft Communications Test System | [Terry_Eldridge] | [Terry_Eldridge] | 2006-08 | |||||
bid-serv | 2259 | tcp | BIF identifiers resolution service | [Li_Zhiping] | [Zhang_Bo] | 2023-03-06 | |||||
bid-serv | 2259 | udp | BIF identifiers resolution service | [Li_Zhiping] | [Zhang_Bo] | 2023-03-06 |